#37B8DB
Closest named color: Turquoise Blue (#06B1C4). oklch(72.9% 0.119 220.4), rgb(55, 184, 219).
Aa
Black text reads best on this color (9.04:1).
About this color
#37B8DB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.119 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.041 away. Black text reads best on it, at 9.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.04:1 |
| White text | 2.32:1 |
Values
| HEX | #37B8DB |
| RGB | rgb(55, 184, 219) |
| HSL | hsl(193, 69%, 54%) |
| OKLCH | oklch(72.9% 0.119 220.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #37B8DB | 2.32:1 | Fails | Lc -50.3 | Large or bold text, headings |
| Black text on #37B8DB | 9.04:1 | AAA | Lc 58.6 | Large or bold text, headings |
| #37B8DB text on white | 2.32:1 | Fails | Lc 45.4 | Large or bold text, headings |
| #37B8DB text on black | 9.04:1 | AAA | Lc -56.7 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DBEEF4
oklch(93.7% 0.022 218.6)
-
Step 200
200
#BCE0EC
oklch(88.5% 0.041 220)
-
Step 300
300
#89CCE2
oklch(80.8% 0.074 220.6)
-
Step 400
400 (this color)
#37B8DB
oklch(72.9% 0.119 220.4)
-
Step 500
500
#0099BA
oklch(63.2% 0.115 220.3)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#004A5B
oklch(37.8% 0.069 219.8)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#37B8DB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #A3B3DD | 0.099 |
| Deuteranopia (no green cones) | #8DA3DB | 0.088 |
| Tritanopia (no blue cones) | #00C3C3 | 0.056 |
| Achromatopsia (no color) | #AAAAAA | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37B8DB
#37B8DB
oklch(72.9% 0.119 220.4)
- #E68D6C
#E68D6C
oklch(72.9% 0.118 41)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #37B8DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.041
- Deep Sky Blue #00BFFF ΔE 0.051
- Vivid Sky Blue #4CC9F0 ΔE 0.054
- Bright Sky Blue #02CCFE ΔE 0.064
- Dark Turquoise #00CED1 ΔE 0.068
- Topaz #13BBAF ΔE 0.072
- Light Sea Green #20B2AA ΔE 0.074
- Greyblue #77A1B5 ΔE 0.079
Use #37B8DB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.